Spare battery for cell phone



FIG. 1 is a perspective view of a spare battery for a cell phone showingour new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side or right side elevational view thereof;

FIG, 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The ornamental design for a “spare battery for cell phone,” as shown anddescribed.